docs: def CreateNetworkConnectivity(in_drainage_line,
                                river_id,
                                next_down_id,
                                out_connectivity_file,
                                file_geodatabase=None):
      """
      Creates Network Connectivity input CSV file for RAPID
      based on the Drainage Line shapefile with river ID and
      next downstream ID fields.
  
      Parameters
      ----------
      in_drainage_line: str
          Path to the stream network (i.e. Drainage Line) shapefile.
      river_id: str
          The name of the field with the river ID
          (Ex. 'HydroID', 'COMID', or 'LINKNO').
      next_down_id: str
          The name of the field with the river ID of the next downstream
          river segment (Ex. 'NextDownID' or 'DSLINKNO').
      out_connectivity_file: str
          The path to the output connectivity file.
      file_geodatabase
          Path to the file geodatabase. If you use this option, in_drainage_line
          is the name of the stream network feature class.
          (WARNING: Not always stable with GDAL.)
  
  
      Example::
  
          from RAPIDpy.gis.network import CreateNetworkConnectivity
  
          CreateNetworkConnectivity(
              in_drainage_line='/path/to/drainageline.shp',
              river_id='LINKNO',
              next_down_id='DSLINKNO',
              out_connectivity_file='/path/to/rapid_connect.csv')
  
      """
      ogr_drainage_line_shapefile_lyr, ogr_drainage_line_shapefile = \
          open_shapefile(in_drainage_line, file_geodatabase)
  
      stream_id_array = []
      next_down_id_array = []
      for drainage_line_feature in ogr_drainage_line_shapefile_lyr:
          stream_id_array.append(drainage_line_feature.GetField(river_id))
          next_down_id_array.append(drainage_line_feature.GetField(next_down_id))
  
      stream_id_array = np.array(stream_id_array, dtype=np.int32)
      next_down_id_array = np.array(next_down_id_array, dtype=np.int32)
  
      StreamIDNextDownIDToConnectivity(stream_id_array,
                                       next_down_id_array,
                                       out_connectivity_file)
  
      del ogr_drainage_line_shapefile